REPLACEMENT POLICY IN DAIRY HERDS ON FARMS WHERE HEIFERS COMPETE WITH THE COWS FOR GRASSLAND .1. MODEL CONSTRUCTION AND VALIDATION

被引：14

作者：

GARTNER, JA

机构：

来源：

AGRICULTURAL SYSTEMS | 1981年 / 7卷 / 04期

关键词：

D O I：

10.1016/0308-521X(81)90040-8

中图分类号：

S [农业科学];

学科分类号：

09 ;

摘要：

引用

页码：289 / 318

页数：30

共 42 条

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